L88A,E,J Aquastat elays INSALLAION INSUCIONS APPLICAION he L88A,E,J Aquastat elays are immersion-type controllers for use with forced hydronic heating systems. he combination high limit and intermediate switching relay works with a low voltage (V) thermostat to control burner and circulator circuits. A call for heat by the thermostat starts both the burner and the circulator. When boiler-water temperature exceeds the high-limit settings, the burner circuit is broken; the circulator continues to operate during the thermostat call for heat. he L88A controls line-voltage burner circuits; the L88E,J control low-voltage burner circuits; the L88J controls millivoltage burner circuits. All models control line-voltage circulator circuits. L88A,E,J have provisions for adding low-limit controllers; L88E,J can power valves in multizone systems. L88E is available with a plug and 0 VA transformer for use with Honeywell Smart Valve SV900/SV9600. SPECIFICAIONS Electrical atings: able. Circulator Control Circuit (A): ype 0 Vac 0 Vac Full Load 7..7 Locked otor..7 able. urner Control Circuit: Model No. Voltage Electrical ating L88A Line Same as circulator control circuit. L88E,J Low 0.8A maximum at Vac. Scale ange: 0 F to 0 F (60 C to 6 C) or 80 F to 0 F (8 C to 6 C). Differential: Nonadjustable. High Limit Dial Stop: Adjustable. Maximum Pressure on Immersion Well: psi (78 kpa). Maximum Ambient emperature: 0 F (66 C) with.a, V load; 77 F ( C) with.a, V load. Maximum ulb emperature: 0 F over setpoint, up to 6 F ( C over setpoint, up to 9 C). hermostat Heat Anticipator Setting: 0.A. Material Safety Data Sheets (MSDS): For information on heat-conductive compound, see form number 69-09. INSALLAION When Installing his Product. ead these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.. Installer must be a trained, experienced service technician.. After installation is complete, check out product operation as provided in these instructions. WANING Explosion Hazard. Can cause severe injury, death or property damage. his product is intended for use only in systems with a pressure relief valve. U.S. egistered rademark Copyright 00 Honeywell All ights eserved 9-690-
L88A,E,J AQUASA ELAYS WANING Electrical Shock Hazard. Can cause severe injury, death or property damage.. Disconnect power supply before beginning installation to prevent electrical shock or equipment damage.. Never apply a jumper across (or short) terminals,, or. his burns out the transformer. Mounting he L88A,J has a case that can be converted to either horizontal or vertical mounting (Fig. ). Fig.. Case is designed for vertical or horizontal mounting. New Installation Order well assemblies and 90 Well Adapter for the Aquastat elay separately; refer to form 68-000, Wells and Fittings for emperature Controllers. oilers usually have tappings that allow the well to be mounted horizontally so boiler water of average temperature can circulate freely.. urn off all power and drain the boiler.. If no tapping is provided, prepare properly sized and threaded tapping near the top of the boiler.. Coat the well threads sparingly with pipe dope; install the well in the boiler tapping and tighten securely. NOE: ACKE POSIION FO VEICAL MOUNING ACKE POSIION FO HOIZONAL MOUNING M8890 Do not attempt to tighten by using the case as a handle.. efill boiler and check for water leakage.. Insert the bulb element into the well until it bottoms. If necessary, slightly bend the tube inside the case to hold the bulb against the bottom of the well. 6. Center the loop of excess tubing in front of the immersion well so it cannot touch any electrical parts. NOE: Some models have an adjustable tubing length to in. (76 mm). For these models, pull out extra tubing from inside the case, if needed. 7. Fit the case into the well so the clamp on the case slides over the flange on the well. IMPOAN est thermal response is obtained with a well that snugly fits the sensing bulb. Insert the bulb until it rests against the bottom of the well. Use a well of correct length and bend the tubing, if necessary, to hold the bulb against the bottom of the well, but do not make a sharp bend in the tubing. If the well is not a snug fit on the bulb, use the heat-conductive compound (furnished with ADELINE models) as follows: Fold the plastic bag of compound lengthwise and twist it gently. hen snip off end of bag and work the open end of bag all the way into the well. Slowly pull the bag out while squeezing it firmly to distribute compound evenly in the well. end the tubing, if necessary, to hold the bulb against the bottom of the well and to hold outer end of the bulb in firm contact with the side of the well. See Fig.. Wipe excess compound from the outer end of the well. eplacement Installation urn off all power and remove the old control. efer to the cover insert of the old control to identify and tag each external lead as it is disconnected. If old well is unsuitable for new installation, remove it and proceed with instructions for new installation. If old well is suitable, use it and a 90 immersion well adapter (ordered separately from form 68-000, Wells and Fittings for emperature Controllers) for the installation. (If the well clamp fits directly over the flange of the existing well spud, adapter use is not necessary.) he adapter has a flange at the wide end that fits into the well clamp and is slotted lengthwise to accommodate both the capillary tube and the short length of tube extending from the bulb.. Loosen but do not remove the well clamp screw on the side of the control case.. Pull out the capillary until the bulb bottoms in the well. Place adapter (if used) around the capillary tube so it fits into the slot. See Fig.. Center the loop of excess capillary tubing in front of the immersion well so it cannot touch any electrical parts. NOE: Some models have a tubing length adjustable to in. (76 mm). For these models, extra tubing inside the case can be pulled out, if needed.. Make sure the wide end of the adapter fits into the hole in the case. Position immersion well clamp snugly over the flange on the adapter and tighten the clamp screw.. Insert sensing bulb into well as shown in Fig.. (Distribute the heat-conductive compound in the tube prior to bulb insertion.). Securely tighten setscrew (if present on old well) against adapter. 9-690
L88A,E,J AQUASA ELAYS CONOLLE CASE IMMESION WELL CLAMP ADAPE IMMESION WELL SPUD OILE ACK OF CONOLLE CASE OLD IMMESION WELL ASSEMLY IMMESION WELL CLAMP SCEW ADAPE IMMESION WELL CLAMP SENSING UL (C) (A) (D) () CAPILLAY UE SESCEW IMMESION WELL CLAMP SCEW SHO UE FIS IN CENAL ECESS OF ADAPE HEA-CONDUCIVE COMPOUND END HE CAPILLAY UE O HOLD HE SENSING UL IN GOOD HEMAL CONAC WIH HE IMMESION WELL A POINS (A) AND (). ASSUE HA CAPILLAY UE FIS FEELY IN HE ADAPE SO HE ENSION OF HE CAPILLAY UE A POIN (C) HOLDS HE SENSING UL IN GOOD HEMAL CONAC WIH HE IMMESION WELL A POIN (D). M880 Fig.. Proper position of sensing bulb in immersion well, and use of well adapter in existing well. WIING IMPOAN he terminals of these Aquastat elays are approved for use with copper wire only. WANING Electrical Shock Hazard. Can cause severe injury, death or property damage. Disconnect power supply before making wiring connections to prevent electrical shock or equipment damage. All wiring must comply with local electrical codes and ordinances. Do not exceed the specifications in the Application section when applying this control. L88J can power up to two V80 Zone Valves. Additional valves, in groups of two or less, require an additional transformer. Follow the appropriate wiring diagrams when using zone valves or a low limit controller. See Fig. through 7. If the terminal on the device being replaced is a / in. tab terminal, use the existing wiring harness terminals to install the replacement device. If the terminal on the device being replaced is a screw terminal, insert the provided tab terminal to screw terminal adapter onto the / in. tab terminal of the replacement device. After the adapter is installed, reuse the existing wraparound wire end to make an electrical connection to the terminal. CAUION Equipment Damage Hazard. Can cause incorrect operation..if L88E,J are used to power zone valves, low voltage ( Vac) load must not exceed.a; a.a load is the maximum permissible when ambient temperature exceeds 77 F ( C). Use additional transformer(s) when load exceeds these ratings..when L88E is used to power SV900/ SV9600, use separate transformer to power zone valves. 9-690
L88A,E,J AQUASA ELAYS L L HO V HEMOSA W L6006 LOW LIMI CONOLLE G L L L88A G L L C C K JUMPE C HIGH LIMI CICULAO K K L88A O LINE VOLAGE OIL UNE ELAY O GAS VALVE C POWE SUPPLY. POVIDE DISCONNEC MEANS AND OVELOADPOECION AS EQUIED. EMOVE JUMPE WHEN ADDING L6006 LOW LIMI CONOLLE. CONOL CASE MUS E CONNECED O EAH GOUND. USE GOUNDING SCEW POVIDED. IS / IN. A EMINAL. M8A Fig.. External connections and internal schematic for L88A. V HEMOSA W L6006 LOW LIMI CONOLLE MILLIVOLAGE POWEPILE GAS VALVE PP H V P W Z HIGH LIMI C C L88J PP H L L G G L L LOW VOLAGE GAS VALVE (eg, V800) K P H H Z W K V L L (HO) AUO MANUAL SWICH L88J CICULAO C C K POWE SUPPLY. POVIDE DISCONNEC MEANS AND OVELOAD POECION AS EQUIED. EMOVE Z-W JUMPE IF SEIES 60 LOW LIMI IS USED. WIE LOW LIMI CONOLLE O ZONE VALVES AS SHOWN. USE WIH V (-) CICUI ONLY. FO V UNE, WIE - AND USE JUMPE Z-W AND P-Z. FO POWEPILE (MILLIVOLAGE) GAS VALVES, EMOVE JUMPE P-Z AND WIE UNE -. JUMPE Z-W EMAINS IN POSIION. CONOL CASE MUS E CONNECED O EAH GOUND. USE GOUNDING SCEW POVIDED. IS / IN. A EMINAL. M79 Fig.. Internal schematic and external connections for L88J with either low voltage or millivoltage gas valves. Low limit added in hookup with V gas valve. 9-690
L88A,E,J AQUASA ELAYS 87F 87F 87F 8 ELAY 8 8 6 6 6 L (HO) L PUMP PUMP PUMP L88A G L L C C C 88G F F OANGE WHIE LACK UNE AND IGNIION POWE SUPPLY. POVIDE DISCONNEC MEANS AND OVELOAD POECION AS EQUIED. CONOL CASE MUS E CONNECED O EAH GOUND. USE GOUNDING SCEW POVIDED. IS / IN. A EMINAL. M8A Fig.. Wiring L88A in oil-fired, forced hot water, tankless, zoned, pump system. D89/M89 976A CALE L88E6 V W VAC HEMOSA K Z FUSE HIGH LIMI CONOLLE K C C POLAIZED -PONG MALE MOLEX PLUG AND -PONG FEMALE MAING PLUG ON CALE 6-PONG FEMALE MOLEX ECEPALE IN L88E AND -PONG MALE MOLEX PLUG ON CALE K L L CICULAO POWE SUPPLY. POVIDE DISCONNEC MEANS AND OVELOAD POECION AS EQUIED. S8600 L (HO) L EMOVE PLUG-IN HA JUMPES PINS AND WHEN USING VEN DAMPE. AFE VEN DAMPE IS PLUGGED INO L88E6, FUSE LOWS WHEN HEMOSA FIS CLOSES. AFE FUSE LOWS, L88E6 OPEAES ONLY WHEN VEN DAMPE IS CONNECED. V GND V SEE VEN DAMPE PODUC SPECIFICAIONS FO INENAL SCHEMAICS. M76C IS / IN. A EMINAL. Fig. 6. Wiring L88E6 with internal plug directly to vent damper in hydronic intermittent pilot system. 9-690
L88A,E,J AQUASA ELAYS ZONE ZONE ZONE V80F VOL HEMOSA VOL HEMOSA VOL HEMOSA L88J V END SWICH L HO L V80F END SWICH V80F END SWICH P W Z 6 H LOW VOLAGE GAS VALVE (eg, V800) MILLIVOLAGE GAS VALVE POWEPILE H PP H H PP C C L L G CICULAO L HO L POWE SUPPLY. POVIDE DISCONNEC MEANS AND OVELOAD POECION AS EQUIED. L88J POWES WO V80E O F ZONE VALVES, O ONLY ONE V80 WHEN AMIEN EMPEAUE EXCEEDS 77 o F ( o C). USE AN ADDIIONAL ANSFOME(S) O POWE ADDIIONAL VALVES. LINK MUS E USED WHEN USING VOL GAS VALVE HOOKUP ( ). EMOVE LINK WHEN MILLIVOLAGE GAS VALVE IS USED ( ). ADD JUMPE. CONOL CASE MUS E CONNECED O EAH GOUND. USE GOUNDING SCEW POVIDED. M887A 6 IS / IN. A EMINAL. Fig. 7. Wiring L88J for multizone control. OPEAION AND SEING High Limit he high limit switch shuts off the burner when the boiler temperature exceeds high-limit setting. ecause heating systems differ, the correct temperature setting for one system might not be correct for another. Follow the boiler manufacturer recommendation for proper setting. o set, remove cover, and turn dial until the desired setting is directly below the pointer. he dial stop is factory-set at the high end of the limit scale. o adjust, use a small screwdriver to hold the stop away from the dial face, and turn the dial until the desired setting is below the pointer. See Fig. 8. elease pressure on screwdriver, and make sure the stop rests flat against the dial face. Switching elay he switching relay is controlled by the room thermostat. On a call for heat, the relay coil is energized, completing the line voltage circulator circuit and also the burner circuit, if the boiler water temperature is below the high limit setting. Auto-Manual Switch he AUO-MANUAL switch (only L88J millivolt models) makes it possible to operate the burner (in a system with a millivoltage gas valve) during an electrical power failure. With switch at MANUAL, the burner operates continuously until either the high limit setting is reached or the switch is reset to AUO. he circulator, requiring line voltage, is inoperative. When power is restored, the switch must be set to AUO to resume automatic burner operation. WANING Explosion Hazard. Can cause severe injury, death or property damage. his product is intended for use only in systems with a pressure relief valve. 9-690
L88A,E,J AQUASA ELAYS INSE CONE OF SMALL SCEWDIVE IN HIS NOCH AND PY SOP UPWAD FOM DIAL FACE WHILE HOLDING SOP AWAY FOM DIAL FACE WIH SCEWDIVE, UN DIAL UNIL DESIED HIGH LIMI SEING IS ALIGNED WIH POINE ELEASE SCEWDIVE; MAKE SUE HIGH-LIMI SOP ESS FLA AGAINS DIAL FACE POINE HIGH LIMI SOP CAUION Equipment Damage Hazard. Improper procedure will damage equipment. Never apply a jumper across (or short) terminals,, or. his burns out the transformer. CHECKOU Put the system into operation and observe through at least one complete cycle to be sure control operates as described above. DIAL FACE M8889 Fig. 8. Setting high limit stop. 7 9-690
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